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A CDN speeds up web applications by caching content closer to users.

FAANG engineers use high-level design principles to create scalable systems.

Data residency is crucial for compliance with laws about where data can be stored.

Caching helps applications respond faster by serving data from memory instead of hitting the database.

Availability is about access; reliability is about correct performance.

Distributed caching spreads data across multiple servers for better performance and reliability.

Stateless servers are easier to scale because they don't store user session data locally.

High Availability ensures your application remains operational even during server failures.

Fault domains help prevent multiple servers from failing together in an architecture.

Container data can be lost unless stored in persistent volumes.

Dependency failures can disrupt applications, but resilience patterns can help manage them.

Disaster recovery ensures systems can restore services and data after major disruptions.

Microservices are useful when you need independent scaling, deployment, and clear boundaries in software design.